Glock USED to be the best alternative to a revolver, 1911, BHP and all generations of S&W pistols. But that was long ago.
Now Glock is just a name that noobs associate with quality - kinda like Colt. Experienced shooters are less likely to shell out $600 for a pistol they can buy from S&W for $350 (and S&W's warranty is much better than Glock's).
